Mac book pro 13"

I have looked and can't find anything related to this.
Questions are my macbook is 3 years old no problems until now little things starting to happen, like keeps disconnecting from the internet, (the internet is updated a year ago high speed etc), keeps closing down on Word, so i reinstalled than downloaded pages instead.
Should i take it in for diagnostic? there is no Apple store where i live so it be a "authorized dealer" place.
Any suggestions appreciated.
thanks

I have looked and can't find anything related to this.
Questions are my macbook is 3 years old no problems until now little things starting to happen, like keeps disconnecting from the internet, (the internet is updated a year ago high speed etc), keeps closing down on Word, so i reinstalled than downloaded pages instead.
Should i take it in for diagnostic? there is no Apple store where i live so it be a "authorized dealer" place.
Any suggestions appreciated.
thanks

Are you connecting via wired, or wireless, and what base station (router) are you using?